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RSAN Question

I am trying to setup RSPAN between 3 switches. I am trying to SPAN all traffic from switch A and Switch B to a port on Switch C. The port on switch C is attatched to a server running some monitoring software.

Currently I am not getting any traffic out of the monitoring port. I am sure it is a setup error on my part. I looked over all of the how to's I could find and as far as I can tell I should be good to go. I would be greatful if someone can look at the config below and set me strait.

Switch A

!

vlan 12

remote-span

!

!

monitor session 1 source vlan 65

monitor session 1 destination remote vlan 12

!

Switch B

!

vlan 12

remote-span

!

monitor session 1 source vlan 65

monitor session 1 destination remote vlan 12

!

Switch C

!

!

vlan 12,25,45,55,65,172

!

monitor session 1 destination interface Gi3/12

monitor session 1 source remote vlan 12

!

interface GigabitEthernet3/12

description To Monitoring Server

switchport

switchport access vlan 12

switchport mode access

speed 1000

duplex full

Adapter on server plugged into port g3/12

IP 10.12.1.5/24

no default gateway configured

2 REPLIES
Hall of Fame Super Silver

Re: RSAN Question

Hello Jeremy,

I think you need to add

vlan 12

remote-span

also on SwitchC: all switches must be aware that vlan12 is a special remote span vlan

see

http://www.cisco.com/en/US/docs/switches/lan/catalyst3750/software/release/12.2_40_se/configuration/guide/swspan.html#wp1081130

Hope to help

Giuseppe

Community Member

Re: RSAN Question

I had it on there earlier and just put it back, but it does not seem to make a difference either way. I will leave it in there though.

Any other sugestions?

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